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[v5,1/3] build: add aarch64 clang to meson cross-compile

Message ID 1611244304-13773-2-git-send-email-juraj.linkes@pantheon.tech (mailing list archive)
State Accepted, archived
Delegated to: Thomas Monjalon
Headers show
Series aarch64 clang cross compilation | expand


Context Check Description
ci/checkpatch warning coding style issues

Commit Message

Juraj Linkeš Jan. 21, 2021, 3:51 p.m. UTC
Create distribution specific meson cross-file
arm64_armv8_linux_clang_ubuntu1804. The file is distribution specific
because it contains paths to headers and libs specific to the
distribution. The clang/LLVM toolchain does not provide its own c stdlib
so the paths must be supplied in some manner.

In the current version of meson, v0.47.1, the only place
where the paths can be specified is the cross-file. Other possibilities
do not work:
* setting CFLAGS, LDFLAGS only sets these for non-cross builds.
* setting -Dc_args, -Dc_link_args on the command line also only sets
these for non-cross builds. Support for specifying these for
cross builds was added in v0.51.0 [0].
* the cross-file can't be split into generic clang cross config and
distribution specific config. Support added in v0.52.0 [1].

[0] https://mesonbuild.com/Builtin-options.html#specifying-options-per-machine
[1] https://mesonbuild.com/Machine-files.html#loading-multiple-machine-files

Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
 config/arm/arm64_armv8_linux_clang_ubuntu1804 | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 config/arm/arm64_armv8_linux_clang_ubuntu1804
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diff --git a/config/arm/arm64_armv8_linux_clang_ubuntu1804 b/config/arm/arm64_armv8_linux_clang_ubuntu1804
new file mode 100644
index 000000000..aa5ee0132
--- /dev/null
+++ b/config/arm/arm64_armv8_linux_clang_ubuntu1804
@@ -0,0 +1,20 @@ 
+c = 'clang'
+cpp = 'clang++'
+ar = 'llvm-ar'
+strip = 'llvm-strip'
+llvm-config = 'llvm-config'
+pcap-config = 'llvm-config'
+pkgconfig = 'aarch64-linux-gnu-pkg-config'
+system = 'linux'
+cpu_family = 'aarch64'
+cpu = 'armv8-a'
+endian = 'little'
+implementor_id = 'generic'
+implementor_pn = 'default'
+c_args = ['-target', 'aarch64-linux-gnu', '--sysroot', '/usr/aarch64-linux-gnu']
+c_link_args = ['-target', 'aarch64-linux-gnu', '-fuse-ld=lld', '--gcc-toolchain=/usr']